This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A078505 #9 Jul 02 2025 20:38:50 %S A078505 4,9,15,21,25,27,28,33,35,39,45,49,51,55,57,63,65,66,69,75,76,77,81, %T A078505 85,87,91,93,95,99,105,111,112,115,117,119,121,123,124,125,129,133, %U A078505 135,141,143,145,147,148,153,155,159,161,165,169,171,172,175,177,183,185,186 %N A078505 Possible values for smallest pseudoprime ( > n ) to base n. %H A078505 Sean A. Irvine, <a href="/A078505/b078505.txt">Table of n, a(n) for n = 1..1000</a> %Y A078505 Cf. A007535. %K A078505 nonn %O A078505 1,1 %A A078505 _Jason Earls_, Jan 05 2003